Key to larvae of the European species of Distoleon

1. Body colour dark brown, dorsal side of the head capsule unmarked, ventral side of the head with large markings (Fig. 12)......................................................................................... D. tetragrammicus

- Body colour ochre, dorsal side of the head capsule with large black markings, ventral side of the head unmarked.............................................................................. .. D. annulatus (from Acevedo et al. 2013)